2006 IFIP International Conference on Wireless and Optical Communications Networks最新文献_第4页

Channel estimation and equalization based on implicit training in OFDM systems 基于隐式训练的OFDM系统信道估计与均衡

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666602

J. P. Nair, R. R. Raja Kumar

引用次数: 7

An activity based mobility prediction strategy for next generation wireless networks 基于活动的下一代无线网络移动性预测策略

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666596

M. S. Sricharan, V. Vaidehi, P. Arun

引用次数: 28

Analysis of optical waveguide structure using beam propagation method for optical wireless communications 基于波束传播方法的光波导结构分析

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666666

L. Suresh, S. Sundaravadivelu, S. Ponmalar

{"title":"Analysis of optical waveguide structure using beam propagation method for optical wireless communications","authors":"L. Suresh, S. Sundaravadivelu, S. Ponmalar","doi":"10.1109/WOCN.2006.1666666","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666666","url":null,"abstract":"Radiation scattered from a parabolic index planar waveguide with the insertion of metal strip at the centre is analyzed to design the photonic antenna, which transfers the energy from waveguide to free space, using beam propagation method (BPM). This technique allows the interpretation of the metal strip as scattering element of the underlying waveguide mode and radiating sources for the diffracted fields. The parabolic index planar waveguide with the insertion of metal strip with high refractive index value is evaluated and often explicit formulas for the radiating parameters of photonic antennas. The framework allows separation of the effects of the metal strip insertion with high refractive index value and the effects of the specific size of the metal strip element. A straightforward analogy between the effects of the metal strip element's refractive index value, shape and the behaviour of photonic antenna systems allow a clear and sensitive understanding of the effects of metal strip on the directionality of waveguide coupled radiation. The results covered only TE modes and it is possible to achieve high directional photonic antennas in the range of optical wireless frequencies. The results are obtained for various operating wavelengths of parabolic index waveguide structure with power distribution along z-direction and the efficient wavelength is proposed for photonic antenna","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129305665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of anti-jamming ad hoc networks using directional beams with group mobility 具有群移动性的定向波束自组网抗干扰性能研究

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666658

Wang Shan, Wang Jian-xin, Zhang Xu-dong, Wei Ji-bo

引用次数: 6

New-MAC protocol for enhancement of QoS performance in wireless LAN 增强无线局域网QoS性能的新mac协议

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666579

S. Vinnakote, S. Naresh, S. Pasupuleti, D. Das

引用次数: 3

Performance analysis of the EDCR algorithm in a distributed wireless sensor network 分布式无线传感器网络中EDCR算法的性能分析

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666547

S. Gamwarige, C. Kulasekere

引用次数: 8

Adaptive subchannel allocation in an OFDMA-based wireless network 基于ofdma的无线网络中的自适应子信道分配

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666553

Patrick Hosein

引用次数: 8

Impact of linear and nonlinear crosstalk on the teletraffic performance of WDM optical networks 线性和非线性串扰对WDM光网络通信性能的影响

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666644

V. Saminadan, M. Meenakshi

{"title":"Impact of linear and nonlinear crosstalk on the teletraffic performance of WDM optical networks","authors":"V. Saminadan, M. Meenakshi","doi":"10.1109/WOCN.2006.1666644","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666644","url":null,"abstract":"Wavelength routed all-optical networks are a class of backbone wide area networks (WANs) where connections are routed by intermediate nodes in the optical domain without electronic conversion. The performance of these networks are limited by the linear crosstalk introduced by the non-ideal characteristics of the switches, demultiplexers and filters employed in the network nodes. Nonlinear impairments like stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), four-wave mixing (FWM), self phase modulation (SPM) and cross phase modulation (XPM) become significant at higher data rates and/or transmitter power. Previous works have considered the impact of linear impairments while establishing a call in WDM networks. However, the impact of nonlinear impairments has not been considered during the establishment of a call. This work attempts to consider the crosstalk caused by SRS and the linear crosstalk introduced by the optical switches and demultiplexers while establishing lightpaths for dynamically arriving call requests in a 15-node mesh network. Crosstalk leads to poor received signal quality at the destination node. This results in increased receiver bit error rate (BER) thereby degrading the teletraffic performance of the network. A lightpath request is accepted only if the bit error rate (BER) at the destination node is less than 10 -12; otherwise it is rejected","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129190223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Investigating cycle demand proportionality in Ethernet passive optical networks 以太网无源光网络周期需求比例性研究

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666646

S. Krijestorac, J. Bagby

{"title":"Investigating cycle demand proportionality in Ethernet passive optical networks","authors":"S. Krijestorac, J. Bagby","doi":"10.1109/WOCN.2006.1666646","DOIUrl":"https://doi.org/10.1109/WOCN.2006.1666646","url":null,"abstract":"Advances in high speed network communications have raised the bar of delivering demanding multimedia and data services through Ethernet passive optical networks (EPONs). At their relatively low cost, EPONs have become an attractive solution to providing essential services like voice, video, and data communications reliably, while at the same time providing expected guarantees of the delivery of those services in terms of defined quality of service measures. A continuous theme throughout EPON research has been the study of efficient dynamic bandwidth allocation (DBA) as a key factor in achieving fairness in distributing bandwidth amongst remote network units. In our research, we investigate another factor and its effect of network performance and service delivery: cycle demand proportionality (CDP). By observing the patterns of demand in the network on an individual network unit basis cycle after cycle, we can deduce load characteristics of some units over others. We can then make decisions about subsequent grant allocations based on this factor and aim to achieve better results in the process. We simulate EPONs under varying loads and incorporate the use of CDP in conjunction with currently used DBA schemes. In this paper we present results of achieving improvements in delay performance under light-load circumstances for the cyclic polling DBA scheme","PeriodicalId":275012,"journal":{"name":"2006 IFIP International Conference on Wireless and Optical Communications Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130791293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Traffic load and QoS-oriented packet scheduling for WCDMA communications WCDMA通信的业务量负荷和面向qos的分组调度

2006 IFIP International Conference on Wireless and Optical Communications Networks Pub Date : 2006-08-07 DOI: 10.1109/WOCN.2006.1666536

Pei Li, Weilin Wu

引用次数: 1